Type-writing machine.



1N0. 386,56'7. PATENTED MAY 5, 1908.

' J. VGLKER.

TYPE WRITING MACHINE. APPL'IOATION mum FEB-15, 1906.

2 SHEETS-SHEET 1.

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J. VGLKER. TYPE WRITING MACHINE. APPLICATION FILED FEB-15, 1906.

PATENTEDVMAYI 5, 1908.

2 SHEETS-SHEET 2.

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JEAN voLKER, or NEU-ISENBURG,GER1\1ANY, ASSIGNOR TQ THE FIRM or PETERWEIL & co, or RODELHEIM, NEAR FRANKFORT-ON-THE-MAIN, GERMANY.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Eat/enter! May 5, 1908.

Application mes Feoruaxy s, nice. Serial No. 1,192.

To all whom it may concern:

Be it known that LJEAN VoLKER, manufacturer, a sub'ect of the GermanEmperor, and resident oi Newlsenburg, near Franklort-on-the-Main,Germany, have invented certain new and useful Improvements in orltelalim to lype,-Vv*ri-ting Machines, of which the Following is-aspecification. This invention has reference to. type; writing machines,and .more particularly to lettenspacing mechanism therefor, inconnection with tabulating work, which will enable the use of theordinary spacing key to be dispensed with.

With ordinary typewriting machines when making a double space, it isnecessary to depress the space-bar after each letter, thus causinginconvenience and mistakes. According to this invention, and in order toavoid these objections, a special mechanism is provided which may beused instead of the ordinary ratchet mechanism and which, at thedepression of 'a letter-key causes the ratchet teeth to advance and toproduce an equivalent forward movement of the. carriage. The means forthrowing-the saidmechanism into and out of gear may consist of a leverdisposed in any convenient position on the machine.

. means for effecting the forwardmotion of the carria e either by theordinary or by my auxiliary flatten-spacing gear. *ig. 4 isa perspectiveview of the device of my invention.

4o" For the purpose of explaining the operation of my auxiliary device,it will be useful to refer to the ordinary mechanism by which thecarriage is caused to move forward step b step for one. division aftereach depression 0 a key. This is effected by so mounting the horizontalplate e as to be oscillated about the horizontal axis p p by suitablemechanism operated in connection with the keys. In a plane parallel tothe axis of oscillation p p is arranged a slide informed with a curvedslot 0 concentric with'the plate e, the concentric movement of the saidslide .being insured by a screw stud d engaging the slot 0 and anotherscrew stud i in engagement with a linger piece I) of the slide 1').-

- moves'the slide 1) against the A tension spring Z whose ends areattached to a lug g of the slide and to a lug h on the plate e, pullsthe slide constantly towards v its idle osition, thus bringin the outerend of the s 0t 0 against the stud d and the stud'i in contact with atooth w formed on the \inner side of the slide. To the. lower'sid'c ofthe' late e is fixed a tooth v and during the osci ation of the plate,the teeth to and o are alternatel brou ht in en agement with the teethof t e ratchet wheela arranged in the center of the platee.

The forward movement of the carriage is transmitted in theiordinarymanner through the intervention of a rack and toothed pinion to thevertical s indle f of the ratchet wheel a whereby the litter isconstantly urged in the direction of the arrow. However, the rotation ofthe wheel a is revented by the tooth "0 which at the norma or horizontalposition of the plate engages in one of theteeth of the ratchet wheel.B'y de ressing a key the portion of. the plate 6 having the tootho isturned downward and the tooth of the slide b enters the next toothof'theratchet 'u and w being such-as to correspond with the teeth ofthesaid wheel. When the tooth 'v is lowered so as to be'free oi the wheel athe lat ter turns in the direction of the arrow and, through theintervention of the tooth 'w, pull of the spring 1. The amount of suchdisplacemerit is limit'e :by' the slot cwhich latter=correspondsto onedivision of the ratchet wheel so that the tooth w cornes'to a dead stopabove the tooth v and kee s the ratchet wheel immovable. When releasinthe key the plate e swivels back to its norma position and its fixedtooth 'v enters from below into the gap of theltoo'th in which the toothw is engaged and the latter moves upwardaa the 'a forward motion for onedivision at'eachuepression of either a letter-b ar or the space-biuzThus far, the mechanism referred to, is

known, but, in order to provide or a double v twice as long as the slotof the slide 1).

Obviously it will be impossible to operate both escapementssimultaneously and means must be provided, for alternately en aging anddisengaging the one or the ct er 0 these escapements, as may be desired.This is ef fected by means of a strap m fitted at its middle with adownwardly projecting in 0, and connected with the plate e. i The p atee is supported by its pivot pins p p int e free ends of arms 1" whoseother ends are pivoted to the main frame of the machine.

The horizontal displacement of the plate e is obtained through theintervention ofa slide bar 0;, to the end 9 of which is connected anoperating lever or the like situated at the front of the machine. Theslide bar is guided in a horizontal lane along the bars 8 s of themainframe of t e machine by means of studs t t which engage in sloth'Lt/lt of the said slide bar. The latter is further formed with a curvedslot y in which the pin 0 of the strap lmengages. The curvature of theslot y-issuch that the endwisemotion of the sliding bar x will producelateral displacements of the plate e in a direction at right angles tothe movement of the bar rand thus cause either the teeth o and w to bebrought in engagement with the ratchet a as shown in. Fig. 3 forordinary 'writing, .or the teeth is and n with the same as shown in Fig.2 for lettrspacing. The ends of the slot 3 are continued slightly in thedirection of the bar as so as to form a lock for .the plate e andprevent its unintentional displacerrrefi $he locking action being due tothe fact that'the bar at has to move a certain distance before theinclined portion of the slot affects the plate e. Having now fullydescribed my said invention, what I claim and desire to secure byLetters Patent is:

1. In -a typewri ting machine the combin ation with the ratchet wheel ofthe carriage motion controlling device, the oscillating framesurrounding said wheel and the ordinary escapement oftlreilatter, of anauxiliary escapement allowing of the ratchet wheel advancing two teeth,and means for shifting said oscillatin frame for throwing the ordinaryand auxiliary escapement alternately in or out of gear, substantially asand for the i purpose described seats? r 2. Iii a typewriti'ng machinethe combine: ,tion with the ratchet wheel of thecarriage controllingdevice, the oscillatin frame and the ordinary escapement' of the atter,of an auxiliary escapement arranged inversely on 7; the oscillatingframe, opposite the ordinary esca ement and adapted to allow of the rateet wheel'advancing two teeth at a time, and means for shifting saidoscillating frame for throwing the ordinaryand auxiliary es- 75capements alternately in. or out of gear, substantially as'and for thepurpose described.

3. In a typewriting machine the combination with the ratchet wheel ofthe carriage controlling device, the oscillatin' frame and go theordinary escapement of the, atter, of an auxiliary escapement arrangedinversely oh the oscillating frame, opposite the ordinary esca ement andadapted to allow of the rate et wheel advancingtwo teeth at a time, 5

and means for shifting the oscillating frame of the controlling devicebodily; in a horizon tal plane to disen a e the teet of one of theesca'pements fronl the ratchet wheel and en:

gage the teeth of the other esc'apement into the latter, and means forlocking the oscillating frame in its 0 erating position, substan, tiallyas and for t e purpose described. v

4. In a typewriting machine the combination with the ratchet wheel ofthe carriage 5 controlling device, theoscillatin frame and the ordinaryescapement of the atter, of anauxilia escapement arrangedinversely onthe osc' lating frame, opposite the ordinary esca ement and adapted toallow .of the ratc et Wheel advancing two teeth at a time, of arms suporting at one end the oscillating pins of the rame and oscillating onthe other I ends on the frame of the typewriting machine, of a straprigidly connecting the two 05 oscillating arms, of a downwardlypro'ecting pin on the middle portion of the sai strap an d on a ing aninc ined slotof an operatin bihslir ably mounted on theframework o thetypewriter, substantially as and for the 10 purpose described. 5. In atypewriting machine the ,combinaev tion with means for effectingstep-motion of the carriage, of an auxiliaryspac ing escape ment, ofoscillating arms, carrying the escapement frame, a strap rigidlyconnected with the said oscillating arms, a pivot down wardly projectin,frornthe said strap and engagin the slot o the slidable o crating bar,

this s ot being obli no in its mir dle part and atits end part paralelto the direction of motion of the operating bar, substantially as andfor the purpose set forth. I

6. Inia typewriting machine,the combination with a ratchet wheel forminga partof a carriage controlling device, an oscillatory frame surroundingsaid wheel, a main escapement mounted thereon, an auxiliary escape:merit for said frame, said main and auxiliary escapements being disposedon said frame'lso at opposite points of said wheels and means 5 oppositeto said main escapement, and means for shifting said frame toalternately throw said main and auxiliary escapeme'nts into operativerelation with said wheel.

7. In a typewritin' muchine the combination with it ratchet wheel, amain escape/merit mechanism adapted to 000 ierete with said ratchetwheel at one oint t iereol', an auxilmy .escapenlent inec ianisniadapted to co 3 operate with said ratchet wheel at a point foralternately throwing said main and auxiliary mechanisms into operativerelation with said wheel.

In testimony whereof I have hereunto set my hand in presence of twowitnesses.

, JEAN VOLRER. Witnesses:

JEAN \GRUND,

CARL GRUND.

